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Self diagnosis
Technical data of self diagnosis
Equipped with
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◆ Fault memory: Non-volatile memory and volatile memory
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◆ Rapid data transfer
Control unit identification
; connecting fault reader V.A.G 1551 and selecting engine electronics control unit
Control unit functions
Note:
The Motronic control unit is equipped with various functions. Some functions can be carried out with ignition switched on or with engine running. The following table details the prerequisites for carrying out the individual functions.
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Function
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Prerequisite
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Engine stationary, ignition switched on
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Engine running at idling speed
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02
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Interrogating fault memory
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yes
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yes
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03
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Final control diagnosis
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yes
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no
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04
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Basic setting
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yes1)
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yes2)3)
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05
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Erasing fault memory
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yes
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yes
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06
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Ending output
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yes
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yes
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07
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Code control unit
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yes
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no
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08
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Read measured value block
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yes
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yes
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1)
Must be carried out after performing the following work:
Replacing control unit, throttle valve control part or engine.
2)
Only possible when the coolant temperature is above 80 °C. Prior to this, this function is blocked.
3)
Must be carried out when checking the idling speed.
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